WO2019154442A1 - Dynamic or quasi-dynamic force detection apparatus and method - Google Patents

Abstract

A dynamic or quasi-dynamic force detection apparatus and method, said apparatus specifically including a base plate (101), a piezoelectric sensing module (102) and a signal analysis module (103). The base plate (101) is used for producing an elastic wave signal according to a touch. The piezoelectric sensing module (102) is connected to the base plate (101), and is used for converting the elastic wave signal into a voltage signal. The signal analysis module (103) is connected to the piezoelectric sensing module (102), and is used for calculating, according to the voltage signal, a fluctuation change value of the voltage signal and calculating, according to the fluctuation change value, force information produced by the touch. The dynamic or quasi-dynamic force detection apparatus and method provide valid three-dimensional force information, are simple in structure, have wide applicability, and may be used in fields such as virtual keyboards, automobile electronics, smart homes, robots and aerospace.

Description

Dynamic or quasi-dynamic force detecting device and method Technical field

The present application relates to the field of electromechanical interaction, and more particularly to a dynamic or quasi-dynamic force detecting device and method.

Background technique

At present, electronic devices such as portable mobile phones and tablet computers exist on the market, and the main operations are completed through a touch screen. Touch screens are more and more popular because of their ease of operation and lower and lower prices. The unique advantage of touch screens is that they can help users achieve the same operational goals without having to move the mouse and tap the keyboard frequently. The composition of the touch screen generally includes a touch panel, a touch response component, a touch control system, a driver, and the like. The main technical solutions adopted by the touch response components include resistive type, capacitive type, infrared type, surface acoustic wave type, etc. These technical solutions have a common disadvantage in addition to the limitations of the self-generated technology, that is, they usually only provide position information. No pressure or strength information is available.

With the development and advancement of technology, touch devices and touch screens that can provide static pressure have emerged. For example, Apple's force touch technology is a measure of the amount of force applied to a touch screen by detecting a capacitive signal. The patent name is "force and position sensing display." This solution requires two transparent substrates, multiple deformable components and two conductive lines. The structure is complex, the cost is high, and the thickness cannot be made very thin. Today's portable devices are designed with space requirements very demanding. The limitations of the application are still relatively strong. In addition to Apple's 3D touch, there is a five-wire resistive touch screen pressure measurement solution from Texas Instruments' resistive touch technology. The patent name is: "Five-wire resistive touch screen pressure measurement circuit and method" . The technical solution adopts a contact brush and a plurality of resistance layers to form a resistor network. When the user touches, a touch resistance is generated at the touch point, and then converted into a current signal to complete the measurement of the touch pressure. This solution also has a complex structure, the thickness does not meet the design requirements of portable devices on the market, and can only provide static pressure or velocity information.

Summary of the invention

The purpose of the present application is to solve the problem that the pressure sensing device in the prior art has a complicated structure, a high cost, and a large limitation. To achieve the above object, the present application specifically provides a dynamic or quasi-dynamic force detecting device, which is dynamic or quasi-dynamic. The force detecting device specifically includes: a substrate, a piezoelectric sensing module, and a signal analyzing module; the substrate is configured to generate an elastic wave signal according to the touch; the piezoelectric sensing module is connected to the substrate, and the The elastic wave signal is converted into a voltage signal; the signal analysis module is connected to the piezoelectric sensing module, and is configured to calculate a fluctuation change value of the voltage signal according to the voltage signal, and obtain a touch according to the fluctuation change value. Touch the generated velocity information.

The present application also provides a dynamic or quasi-dynamic force detection sensing method, the method comprising: receiving an elastic wave signal generated by a touch on a substrate; converting the elastic wave signal into a voltage signal; and calculating according to the voltage signal Obtaining a fluctuation change value of the voltage signal, and calculating the velocity information generated by the touch according to the fluctuation variation value.

The present application also provides an electronic device comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, the processor implementing the method when the computer program is executed.

The application also provides a computer readable storage medium storing a computer program for performing the above method.

The beneficial technical effect of the present application is that the dynamic or quasi-dynamic force detecting device and method provided by the application can provide effective three-dimensional force information, and has the advantages of simple structure and wide applicability, and can be applied to a virtual keyboard, a car electronic, a smart home. , robots, aerospace and other fields.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic diagram of a dynamic or quasi-dynamic force detecting device according to an embodiment of the present application;

2 is a schematic diagram of a dynamic or quasi-dynamic force detecting device according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a dynamic or quasi-dynamic force detecting apparatus applied to a smart phone according to an embodiment of the present application; FIG.

4 is a schematic diagram of a dynamic or quasi-dynamic force detecting device applied to a portable computer according to an embodiment of the present application;

FIG. 5A is a schematic structural diagram of a dynamic or quasi-dynamic force detecting apparatus according to an embodiment of the present application; FIG.

FIG. 5B is a schematic diagram of the use of a dynamic or quasi-dynamic force detecting apparatus according to an embodiment of the present application; FIG.

FIG. 6 is a schematic flowchart diagram of a dynamic or quasi-dynamic force detection method according to an embodiment of the present application;

FIG. 7 is a schematic block diagram of a system configuration of an electronic device according to an embodiment of the present application.

Detailed ways

In order to make the technical features and effects of the present application more obvious, the technical solutions of the present application are further described below with reference to the accompanying drawings, and the present application may also be described or implemented in various other specific examples, and any person skilled in the art is in the scope of the claims. Equivalent transformations made within the scope of protection of this application.

In the description of the present specification, the description of the terms "an embodiment", "a specific embodiment", "such as" and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in the present application. At least one embodiment or example. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of the steps involved in the embodiments is used to schematically illustrate the implementation of the present application, and the order of the steps is not limited, and may be appropriately adjusted as needed.

Referring to FIG. 1 , in the embodiment, the dynamic or quasi-dynamic force detecting device provided by the present application may include a substrate 101 , a piezoelectric sensing module 102 , and a signal analyzing module 103 ; wherein the substrate 101 may be a The rigid medium or a combination thereof acts to generate an elastic wave signal when an external object (such as a finger, a stylus, etc.) touches the substrate 101, and the elastic wave signal is captured by the piezoelectric sensing module 102 and converted into The voltage signal having the same frequency as the elastic wave signal is of course only for the convenience of later calculation, so that the converted voltage signal can be the same as the frequency of the elastic wave signal, and can be converted into a voltage signal of a different frequency in actual operation, and the calculation is later. The corresponding adjustment may be performed, and the conversion process is not further limited herein; after that, the signal analysis module 103 calculates and calculates the difference between the voltage signal and the voltage signal under the reference voltage signal. The fluctuation value of the voltage signal is further obtained according to the correlation between the fluctuation value and the velocity, and the velocity information when the external object is touched is obtained. Detection. It should be noted that the material of the substrate 101 in this embodiment may not only be a rigid medium or a combination thereof, but also other conductive media capable of conducting elastic waves; the substrate 101 may also be selected according to specific needs in structure. For example, a planar structure, a curved surface structure, and a planar or curved structure with perforations; the signal analysis module 103 can be an existing processing chip with a computational analysis function, a single chip device, etc.; in actual work, the staff can Actual need to choose to use, this application does not impose too many restrictions here.

In order to more accurately know the magnitude of the force used by the external object when touching the substrate, in an embodiment of the present application, the reference value between the position of the elastic wave signal and the distance between the piezoelectric sensor is further referred to. For details, please refer to FIG. 2 In this embodiment, the dynamic or quasi-dynamic force detecting device provided by the present application includes a position detecting module, and the piezoelectric sensing module can be one or more piezoelectric sensors, and the piezoelectric sensor functions as The elastic wave signal is converted into a voltage signal of a corresponding frequency, and then the energy value of the elastic wave is calculated by using the fluctuation of the wave represented by the late use frequency; of course, in actual work, when the elastic wave signal is converted into a voltage signal, it can also be transformed. For the voltage signal of other frequencies, after calculating the velocity information according to the voltage signal, the velocity information is matched with the actual strength situation, and the velocity information represents the actual velocity situation, and the present application does not convert the elastic wave signal into a voltage. When the signal is used, the conversion frequency is further limited, and those skilled in the art can select and make according to actual needs. In addition, when the piezoelectric sensor is three or more, the position detecting module may further calculate position information of the touch of the external object according to the elastic wave information, wherein the positioning is obtained by using the elastic wave to obtain the position information. The method is similar to the prior art, and the propagation distance of the elastic wave is determined by the time difference of the elastic wave received by the piezoelectric sensor at each point, and the position of the elastic wave signal is generated according to the propagation distance, and the specific process and method are not detailed here. Said. In actual use, the piezoelectric sensor may be directly or indirectly mounted in the substrate or on the surface, and the elastic wave signal obtained by using the piezoelectric sensor disposed at an appropriate position, the calculated distance reference value and the elastic wave are obtained. The attenuation ratio on the substrate can be calculated by inversely calculating the energy condition when the elastic wave signal is generated, that is, the fluctuation value. At this moment, more realistic velocity information can be obtained according to the fluctuation variation value; for example, mounting on the substrate Piezoelectric ceramic sensors at different positions receive elastic wave signals at times A1, A2, and A3, respectively. At this time, based on the characteristics of elastic wave diffusion, the respective positions a1, a2, and a3 of the piezoelectric ceramic sensors are used to receive the elastic wave signals. The time A1, A2, A3 and the velocity v of the elastic wave propagation can be calculated to obtain the initial generation position C of the elastic wave signal. When the position of the elastic wave signal is determined, according to C, any one of the above piezoelectric ceramic sensors is used. The distance L between the sensors, the propagation velocity v of the elastic wave signal on the substrate, and the degree of attenuation f and the final received elastic wave signal Initially available energy is the case when the elastic wave signal generator E, in order to further calculate a more realistic intensity information. Of course, the method for obtaining the distance in actual work is not only the above method, but the distance can also be used for other strength information correction, and other methods for obtaining the above distance will be specifically described later, and will not be described in detail herein.

或

The signal analysis module in the dynamic or quasi-dynamic force detecting device in an embodiment of the present application is further configured to: when the piezoelectric sensing module includes a plurality of piezoelectric sensors, output a voltage signal of each piezoelectric sensor. Calculating the fluctuation value corresponding to each piezoelectric sensor separately; accumulating the fluctuation change value to calculate the velocity information generated by the touch; specifically, one or more piezoelectric sensors C ₁ to C _n may be used to receive each The obtained elastic wave signals are respectively converted into voltage signals D ₁ to D _n which are in accordance with the frequency of the elastic wave signals received therefrom, and the energy values E _{1 of the} respective voltage signals are respectively calculated according to the fluctuation values of the respective voltage signals D ₁ to D _n . To E _n , finally accumulate and/or average one or more values of the energy values E ₁ to E _n to obtain the final elastic wave total energy value (when only one energy value E ₁ is obtained, no further accumulation is performed) And the average or 1*E ₁ /1), at this time, the total energy value of the elastic wave can reflect the pressure information generated by the substrate under the touch state, thereby obtaining actual strength information; it is worth noting that, in the above process in, The method of calculating the energy value based on the voltage signal can be mainly calculated by the following formula:

or

In the above formula, m is the number of signal points collected; n is the number of signal points determined by selecting the wavelength of the voltage signal of a predetermined length according to actual conditions, and those skilled in the art can select settings according to actual needs, and the present application does not further limit here. ; E is the energy value of the voltage signal.

Thereafter, the energy value of the elastic wave obtained above is used to determine the range of the force, for example, according to the energy value of the elastic wave, a plurality of strength grading thresholds, such as F1, F2, and F3, wherein F1 represents the minimum gear strength, Corresponding to the energy value of E1 to Ex, F2 represents the mid-range strength, which can correspond to the energy value of Ex+1 to En-y, and F3 represents the highest-grade strength, which can correspond to the energy value of En-y+1 to En; The velocity grading thresholds (E1 to Ex, Ex+1 to En-y, En-y+1 to En) establish a mapping table corresponding to the output instructions; comparing the energy values of the elastic waves with the velocity grading thresholds And outputting a corresponding output instruction according to the comparison result and the mapping table; thereby, when the actual operation is later, the external device performs different operations according to different output instructions, thereby providing a more diverse selection of users.

In the above embodiment, in order to improve the calculation efficiency, in practice, the maximum value or the minimum value of the fluctuation change value occurring in the predetermined period may be used as the characterization signal, and the tempo information is obtained according to the characterization signal; The value can be used to calculate the actual touch force of the elastic wave signal only by extracting the maximum value or the minimum value in the fixed period; of course, those skilled in the art can also calculate the characteristics of the fluctuation value by other means, and then This feature is used as a basis for calculating actual velocity information; the present application is not limited herein.

Referring to FIG. 3 to FIG. 4 , in the embodiment, when the dynamic or quasi-dynamic force detecting device provided by the present application is applied to an existing intelligent electronic device, the position detecting function of the existing electronic device can be utilized. Position determination, for example, when applied to a smartphone device, determining a horizontal and vertical coordinate position of the touch position through a touch screen of the smart phone, and calculating a position between the horizontal and vertical coordinate positions and the position of the piezoelectric sensor Deep Touch Distance, in order to provide accurate distance reference value for subsequent strength determination. Of course, in actual work, the smart device uses the resistance on the screen, the position of the capacitance to change the position of the touch, or the optical or infrared method. Without limitation, those skilled in the art can choose to use according to actual needs. The signal analysis module may also be implemented by using other component combinations or specific chips, such as the interface module and the central processing module 304, 405 in FIG. 3 to FIG. 4, which is not specifically limited herein. After obtaining the position information generated by the touch on the substrate by using the external smart device, further, the position information may be used to calculate the velocity information generated by the actual touch and whether the touch is the true intention of the user; The manner in which the velocity information is calculated according to the location information has been explained in the above description, and will not be described in detail herein. The manner of determining whether the touch is the user's true intention according to the location information will pass. The subsequent anti-missing detection module uses specific examples and will not be described in detail here.

Referring to FIG. 3 again, in this embodiment, a pressing keyboard is mainly involved, and the keyboard includes a substrate 301, a keyboard film 302, a housing 303, a central processing module 304, and a voltage sensor 305, so as to facilitate data collection accuracy. The voltage sensor may be disposed at four corners of the keyboard film 3002, and the substrate 301 is disposed on the keyboard film 302. The two may be directly connected or connected by other media capable of conducting elastic waves, and the housing 303 is used to protect the above. The interface module is electrically connected to the voltage sensor 305 via a flat wire connected FFC or other means for outputting the voltage signal converted by the voltage sensor 305 to the central processing module 304, and then according to the central processing module 305. The voltage signal is calculated to obtain a fluctuation change value of the voltage signal, and the velocity information generated by the touch is calculated according to the fluctuation change value; and then the velocity information is forwarded to an external device system through the interface module to be used for other Processing; in conjunction with FIG. 3 and referring to FIG. 4, in this embodiment, a dynamic or quasi-dynamic force detecting device is provided on a portable computer. For example, the portable computer includes a display 401, a substrate 402, a keyboard film 403, a housing 404, a central processing module 405, and a voltage sensor 406, which are the same as the keyboard example in FIG. 3. In this embodiment, the substrate 402 is used to obtain a touch. After the information, the strength information is obtained by the subsequent central processing module 405, and the velocity information is forwarded to the processing chip of the portable computer through the interface module, and the output is displayed by the display 401 after being processed by the processing chip; The dynamic or quasi-dynamic force detecting device provided by the present application can be relatively simply applied to an existing portable computer or other smart device. In this way, the overhead of components such as a capacitive touch screen in the existing device can be omitted, and the structure is relatively simple. The occupied space is small and the applicability is strong.

Similarly, in order to facilitate the accuracy of the calculation result of the later velocity information, the signal analysis module provided by the present application may further include a signal pre-processing unit, after converting the elastic wave signal into a voltage signal of the same frequency. Further performing one or more processing of filtering processing, amplification processing, rectification processing, switching processing, Fourier transform processing, and wavelet transform processing, thereby further eliminating unnecessary errors caused by irrelevant signal data on post-calculation results, When the above signal processing flow can be completed by the prior art, it will not be introduced one by one here. Specifically, as shown in FIG. 5A, the dynamic or quasi-dynamic force detection apparatus provided by the present application may include a central processing module, an interface module, a plurality of sensor modules, and a device system interface, where the central processing module and the device system interface are And the interface module is a signal analysis module, and the sensor module includes the piezoelectric sensor module provided by the present application; in actual use, the device system interface can be connected to an external device, so that the dynamic or quasi-dynamic force detecting device Can effectively interface with external devices.

Referring to FIG. 5B, in the embodiment, the dynamic or quasi-dynamic force detecting device provided by the present application is preferably used in various fields such as smart furniture and vehicles, for example, the dynamic or quasi-dynamic force is used. The detecting device is added to the existing storage cabinet 501 and used in conjunction with a controllable unlocking structure to enable the dynamic or quasi-dynamic force detection when the user presses a specified position or all areas on the storage cabinet 501 to a certain strength. The device outputs an unlocking command to the controllable unlocking structure, and the storage cabinet 501 completes the opening and closing operation. In the process, the pressing receiving position of the storage cabinet 501 can be specified, and the pressing position is indistinguishable from other regions. The owner of the non-storage cabinet 501 cannot confirm the switch position through the appearance of the storage cabinet, so that the storage cabinet 501 has high privacy, which further ensures the safety of the user; similarly, it is known that the driver cannot effectively use the vehicle 502 when driving. It is confirmed whether a slight collision occurs outside the vehicle 502. When the vehicle 502 is running, the vehicle 502 cannot be detected in time because it cannot be detected. The situation often leads to the intensification of late collisions, resulting in unnecessary loss of personal and property; based on this problem, by placing the dynamic or quasi-dynamic force detecting device provided by the present application inside the vehicle body, when the vehicle 502 collides more than certain At the time of the force, the driver can be prompted to collide with the warning device to prevent the driver from continuing the current action to intensify the collision and cause unnecessary loss; of course, the dynamic or quasi-dynamic force detecting device provided by the application is not only applicable to In the above-mentioned field, in actual work, the staff can appropriately use it in the field of requiring force judgment and detection according to actual needs, and the present application is not limited herein.

Based on the energy-saving and high-efficiency considerations, there is a non-advisive touch behavior in the actual work. In order to avoid the unnecessary force detection work caused by the unattended touch behavior, in an embodiment of the present application, the dynamic or quasi-dynamic force detection is performed. The device may further comprise an anti-collision detection module, wherein the anti-collision detection module is configured to compare the duration and/or the signal strength of the elastic wave signal generated on the substrate with a predetermined threshold, and determine the current elasticity according to the comparison result. Whether the wave signal is a false touch. Specifically, when the substrate is externally touched, the strength anti-missing detection module performs a monitoring state, and at this moment, the current time T0 and the elastic wave signal end time T1 are recorded, and the difference time t between T1 and T0 is The predetermined threshold is compared, and it is determined whether the touch is a false touch according to the comparison result. For example, when the time exceeds a predetermined threshold or is lower than a predetermined threshold, the non-user active behavior is represented, and the touch behavior is ignored. Elastic wave signal; of course, when judging whether the elastic wave signal generated when the touch is a false touch, the intensity of the elastic wave signal can also be included in the judgment range, for example, when the elastic wave signal is received, the elastic wave is judged The intensity of the signal, if less than or greater than F1, means that the elastic wave signal is not actively applied by the user, and the elastic wave signal generated by the touch behavior is also ignored at this moment;

Further, the anti-collision detection module may further compare the position information with a predetermined position area, and determine, according to the comparison result, whether the current elastic wave signal is an accidental collision. For example, when using a smart device such as a portable computer, an elastic wave is generated when a touch is made outside the screen, but at this time, the touch is not the user's operation intention, and the touch position and the predetermined position can be determined at this moment (smart device) The comparison result of the operation area) determines whether the touch is the user's true intention; of course, sometimes even if the user touches in the designated area, it is not necessarily the user's real operation intention, for example, the user will use a smart device such as a mobile phone. Put into the pocket, in the walking or other motion picture, the operation interface of the mobile phone is also elastic wave when it contacts other external objects, but the elastic wave is not the operation of the user; for this reason, the anti-missing detection module can also Comparing the duration and/or the signal strength of the elastic wave signal generated on the substrate with a predetermined threshold, and determining whether the current elastic wave signal is an accidental collision according to the comparison result; thereby further confirming the operation time or operation condition Whether the operation is the user's true intention. In the actual work, the staff can determine whether the received elastic wave signal is a false touch by combining one or more of the above-mentioned ones or more by the judgment method. The present application does not impose any limitation here.

Please refer to FIG. 6 , the present application further provides a dynamic or quasi-dynamic force detection method, the method specifically includes: S601 receives an elastic wave signal generated by a touch on a substrate; S602 converts the elastic wave signal into a voltage signal. S603 calculates and obtains a fluctuation change value of the voltage signal according to the voltage signal, and calculates, according to the fluctuation change value, velocity information generated by the touch. In the above method, the main flow is that the substrate can be a rigid medium or a combination thereof, and the elastic wave propagation medium acts to generate an elastic wave signal when an external object (such as a finger, a stylus, etc.) touches the substrate. The elastic wave signal is captured by a sensor such as a piezoelectric sensing module, and converted into a voltage signal having the same frequency as the elastic wave signal, thereby retaining the energy characteristic of the elastic wave signal; thereafter, the signal analysis module Obtaining a fluctuation variation value of the voltage signal according to a difference between the voltage signal and a standard voltage signal (a voltage signal under a reference voltage signal), and obtaining the externality according to the correlation between the fluctuation variation value and the velocity The velocity information is detected when the object touches.

In order to improve the accuracy of the later velocity data, the above step S102 further includes: after converting the elastic wave signal into a voltage signal of the same frequency, further performing filtering processing, amplification processing, rectification processing, switching processing, Fourier transform processing, and wavelet processing. One or more processes in the transform process to obtain a pre-processed signal; thereby further eliminating unnecessary errors caused by the unrelated signal data on the post-calculation result, when the above signal processing flow can be completed by the prior art, This will not be introduced one by one. Thereafter, based on the pre-processed voltage signal, a difference between the pre-processed signal and the voltage reference value is calculated to obtain the fluctuation change value. In the actual work, in order to improve the calculation efficiency of the above-mentioned force detection sensing method, after the elastic wave signal occurs, the above step S602 further includes intercepting the predetermined length signal segment of the elastic wave signal according to the current detection environment for subsequent conversion processing, Specifically, according to the degree of attenuation of the elastic wave in the current detection environment, the propagation condition of the propagation medium, the touch form of the touch may be taken to intercept the waveform data of different lengths of the elastic wave signal, and then the waveform data is converted into the corresponding frequency. The voltage signal is used to calculate the velocity information when the touch is generated; of course, in the step of converting the waveform data into a voltage signal of a corresponding frequency, the voltage signal may be converted into a voltage signal of another frequency, and then according to the voltage signal. After the strength information is calculated, the velocity information is matched with the actual strength, and the velocity information represents the actual strength. The conversion frequency is further limited when the elastic wave signal is converted into a voltage signal. Personnel can choose to use according to actual needs.

In order to more accurately know the magnitude of the force used when the external object touches the substrate, in an embodiment of the present application, a reference value of the distance between the position where the elastic wave signal is generated and the piezoelectric sensor is further referred to, for example, in the above step S103. The method further includes: acquiring position information of the elastic wave signal generated by the touch on the substrate according to the elastic wave signal; and calculating velocity information generated by the touch according to the fluctuation variation value and the position information. As for the manner in which the location information is obtained, it has been explained in the foregoing, and will not be described in detail herein.

Based on the energy-saving and high-efficiency considerations, there is a non-advisive touch behavior in the actual work. In order to avoid the unnecessary force detection work caused by the unattended touch behavior, in an embodiment of the present application, the above steps S101 and S102 The method further includes comparing the duration and/or the signal strength of the elastic wave signal generated on the substrate with a predetermined threshold, and determining whether the current elastic wave signal is an accidental collision according to the comparison result. Specifically, when the substrate is externally touched, the strength anti-missing detection module performs a monitoring state, and at this moment, the current time T0 and the elastic wave signal end time T1 are recorded, and the difference time t between T1 and T0 is The predetermined threshold is compared, and it is determined whether the touch is a false touch according to the comparison result. For example, when the time exceeds a predetermined threshold or is lower than a predetermined threshold, the non-user active behavior is represented, and the touch behavior is ignored. Elastic wave signal; of course, when judging whether the elastic wave signal generated when the touch is a false touch, the intensity of the elastic wave signal can also be included in the judgment range, for example, when the elastic wave signal is received, the elastic wave is judged If the strength of the signal is less than or greater than F1, it means that the elastic wave signal is not actively applied by the user. At this moment, the elastic wave signal generated by the touch action is also ignored. In actual work, the staff can set the above two according to actual needs. One or a combination of the two determines whether the received elastic wave signal is an accidental touch. The present application does not impose any limitation here.

The dynamic or quasi-dynamic velocity detecting method in an embodiment of the present application may further include: obtaining a pre-stored correction coefficient according to a frequency of the elastic wave signal; and adjusting the velocity information by the correction coefficient. Specifically, it can be based on Fact=K*f+B+F; where Fact is the corrected velocity information, F is the original velocity information before the correction, f is the main frequency or average frequency of the signal, and K and B are the correction coefficients. Thus, a correction relationship can be obtained. In general, K is a negative number, that is, when the frequency is higher, the strength becomes smaller after being corrected. In addition, the frequency correction can also be obtained by multiplying the original velocity F by a correction coefficient, that is, Fact=Ks*F; wherein Fact is the corrected velocity information, F is the original velocity before the correction, and Ks is the correction coefficient. The correction coefficient Ks is pre-stored in the signal analysis module, and the correction coefficient Ks is selected according to different frequencies and set in advance. Those skilled in the art can provide the appropriate detection test in the early stage, and the present application will not be described here.

In the actual work, the vibration generated by the external or internal components or other devices during the force detection interferes with the velocity detection; the dynamic or quasi-dynamic velocity detection method described in an embodiment of the present application may further include: The elastic wave signal generated on the substrate is periodically analyzed, when the periodicity of the elastic wave signal meets a preset condition; an effective signal is obtained by removing the periodic signal component in the elastic wave signal, and according to the effective signal The velocity information generated by the touch is obtained by calculation. In this way, the interference caused by the periodic interference source to the actual velocity detection can be further reduced by the above manner.

或

In an embodiment of the present application, the dynamic or quasi-dynamic velocity detecting method provided by the present application may further convert each received elastic wave signal into the received one by using one or more piezoelectric sensors C ₁ to C _n . acoustic wave frequency of the voltage signal of the same signal D ₁ to D _n, each voltage signal is then calculated in accordance with values of the fluctuating voltage signals D ₁ to D _n are the energy values E ₁ through E _n, and then finally to an energy value E ₁ The accumulation of one or more values in E _n obtains the final total energy value of the elastic wave. At this time, the total energy value of the elastic wave can reflect the pressure information generated by the substrate under the touch state, thereby obtaining actual velocity information. It is worth noting that in the above process, the method of calculating the energy value based on the voltage signal can be mainly calculated by the following formula:

or

In the above formula, m is the number of signal points collected; n is the number of signal points determined by selecting the wavelength of the voltage signal of a predetermined length according to actual conditions, and those skilled in the art can select settings according to actual needs, and the present application does not further limit here. ; E is the energy value of the voltage signal.

Thereafter, the energy value of the elastic wave obtained above is used to determine the range of the force, for example, according to the energy value of the elastic wave, a plurality of strength grading thresholds, such as F1, F2, and F3, wherein F1 represents the minimum gear strength, Corresponding to the energy value of E1 to Ex, F2 represents the mid-range strength, which can correspond to the energy value of Ex+1 to En-y, and F3 represents the highest-grade strength, which can correspond to the energy value of En-y+1 to En; The velocity grading thresholds (E1 to Ex, Ex+1 to En-y, En-y+1 to En) establish a mapping table corresponding to the output instructions; comparing the energy values of the elastic waves with the velocity grading thresholds And outputting a corresponding output instruction according to the comparison result and the mapping table; thereby, when the actual operation is later, the external device performs different operations according to different output instructions, thereby providing a more diverse selection of users.

The present application further provides an electronic device, which may be a desktop computer, a tablet computer, a mobile terminal, etc., and the embodiment is not limited thereto. In this embodiment, the electronic device may refer to the implementation of the foregoing method and the foregoing apparatus, and the content thereof is incorporated herein, and the details are not described again.

FIG. 7 is a schematic block diagram of a system configuration of an electronic device 600 according to an embodiment of the present application. As shown in FIG. 7, the electronic device 600 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100. It should be noted that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

In one embodiment, the velocity information calculation process can be integrated into the central processor 100. The central processing unit 100 may be configured to perform control to obtain a fluctuation variation value of the voltage signal according to the voltage signal, and calculate velocity information generated by the touch according to the fluctuation variation value.

The calculating, by the voltage signal, the fluctuation change value of the voltage signal, comprising: obtaining the fluctuation change value according to a difference between the pre-processed signal and the voltage reference value.

The obtaining the velocity information generated by the touch according to the fluctuation variation value includes: forming a maximum or minimum value of the fluctuation variation value in a predetermined period as a characterization signal, and obtaining the velocity information according to the characterization signal.

Or acquiring position information generated by the touch on the substrate, calculating, according to the fluctuation change value and the position information, velocity information generated by the touch; and comparing the position information with the predetermined position region, according to the comparison result. Determine whether the current elastic wave signal is a false touch.

The calculating the velocity information generated by the touch according to the fluctuation variation value includes: comparing the location information with a predetermined location region, and determining, according to the comparison result, whether the current elastic wave signal is an accidental collision;

Or comparing the duration and/or the signal strength of the elastic wave signal generated on the substrate with a predetermined threshold, and determining whether the current elastic wave signal is an accidental collision according to the comparison result;

Or converting the elastic wave signal into a voltage signal of a corresponding frequency by one or more piezoelectric sensors; calculating an energy value of the elastic wave according to the fluctuation value of the one or more voltage signals, according to the elastic wave The energy value obtains the velocity information generated by the touch; if the fluctuation value is accumulated and/or averaged according to the predetermined length of the voltage signal, the energy value of the voltage signal is obtained; according to the one or more voltage signals The energy values are accumulated and/or averaged to obtain the energy value of the elastic wave.

The central processing unit 100 may be configured to perform control of: dividing a plurality of strength grading thresholds according to the energy value of the elastic wave; establishing a mapping table of output instructions corresponding thereto according to the grading threshold; and the elastic wave The energy value is compared with the velocity ranking threshold, and a corresponding output instruction is output according to the comparison result and the mapping table.

And obtaining a pre-stored correction coefficient according to the frequency of the elastic wave signal; and adjusting the velocity information by the correction coefficient.

And performing periodic analysis on the elastic wave signal generated on the substrate, when the periodicity of the elastic wave signal meets a preset condition; obtaining an effective signal by removing the periodic signal component in the elastic wave signal, and according to The effective signal obtains the velocity information generated by the touch by calculation.

As shown in FIG. 7 , the electronic device 600 may further include: a communication module 110 , an input unit 120 , a piezoelectric sensor 130 , a display 160 , and a power source 170 . It should be noted that the electronic device 600 does not have to include all the components shown in FIG. 7; in addition, the electronic device 600 may further include components not shown in FIG. 7, and reference may be made to the prior art.

As shown in FIG. 7, central processor 100, also sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls various components of electronic device 600. The operation of the part.

The memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. The above-mentioned information related to the failure can be stored, and a program for executing the related information can be stored. And the central processing unit 100 can execute the program stored by the memory 140 to implement information storage or processing and the like.

Input unit 120 provides input to central processor 100. The input unit 120 is, for example, a button or a touch input device. The power source 170 is used to provide power to the electronic device 600. The display 160 is used to display a display object such as an image or a character. The display device 160 can be, for example, a touch device such as an LCD display. The input unit 120 can be integrated with the display device 160 to implement a touch display function, but is not limited thereto.

The memory 140 can be a solid state memory such as a read only memory (ROM), a random access memory (RAM), a SIM card, or the like. It is also possible to store a memory that can be selectively erased and provided with more data even when the power is turned off, and an example of the memory is sometimes referred to as an EPROM or the like. Memory 140 can also be some other type of device. Memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application/function storage section 142 for storing an application and a function program or a flow for executing an operation of the electronic device 600 by the central processing unit 100.

The memory 140 may also include a data storage portion 143 for storing data such as contacts, digital data, pictures, sounds, and/or any other data used by the electronic device. The driver storage portion 144 of the memory 140 may include various drivers for the communication function of the electronic device and/or for performing other functions of the electronic device such as a messaging application, an address book application, and the like.

The communication module 110 is a transmitter/receiver 110 that transmits and receives signals via the antenna 111. A communication module (transmitter/receiver) 110 is coupled to the central processing unit 100 to provide an input signal and receive an output signal, which may be the same as in the case of a conventional mobile communication terminal.

Based on different communication technologies, a plurality of communication modules 110, such as a cellular network module, a Bluetooth module, and/or a wireless local area network module, may be provided in the same electronic device. The communication module (transmitter/receiver) 110 also issues a designated signal after obtaining a corresponding command via the central processing unit 100, thereby implementing a general telecommunication function. Piezoelectric sensor 130 can include any suitable piezoelectric sensing element, such as a thin film piezoelectric sensor or the like.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

The specific embodiments of the present invention have been described in detail with reference to the specific embodiments of the present application. It is to be understood that the foregoing description is only The scope of protection, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Claims (29)

A dynamic or quasi-dynamic force detecting device, characterized in that the device comprises a substrate, a piezoelectric sensing module and a signal analysis module; The substrate is configured to generate an elastic wave signal according to a touch; The piezoelectric sensing module is connected to the substrate for converting the elastic wave signal into a voltage signal; The signal analysis module is connected to the piezoelectric sensing module, configured to calculate a fluctuation change value of the voltage signal according to the voltage signal, and calculate, according to the fluctuation change value, velocity information generated by the touch. The dynamic or quasi-dynamic velocity detecting device according to claim 1, wherein the signal analyzing module further comprises a signal pre-processing unit, wherein the signal pre-processing unit is configured to perform filtering processing and amplification processing on the voltage signal. One or more processes in the rectification process, the switch process, the Fourier transform process, and the wavelet transform process, to obtain a preprocessed signal. The dynamic or quasi-dynamic velocity detecting device according to claim 2, wherein the signal analysis module further comprises an energy value calculating unit, wherein the energy value calculating unit is configured to use the pre-processing signal and the voltage reference value The difference value between the calculations obtains the fluctuation change value. The dynamic or quasi-dynamic velocity detecting device according to claim 1, wherein the signal analysis module further comprises an energy value calculating unit, wherein the energy value calculating unit is further configured to: according to the voltage signal and the voltage reference value The difference value between the calculations obtains the fluctuation change value. The dynamic or quasi-dynamic force detecting device according to claim 1, wherein the piezoelectric sensing module comprises at least one piezoelectric sensor for receiving the elastic wave signal and The elastic wave signal is converted into a voltage signal of a corresponding frequency. The dynamic or quasi-dynamic force detecting device according to claim 5, wherein the signal analyzing module is further configured to output each piezoelectric sensor when the piezoelectric sensing module comprises a plurality of piezoelectric sensors The voltage signals are respectively calculated to obtain the fluctuation change values corresponding to the respective piezoelectric sensors; and the fluctuation change values are accumulated or averaged to calculate the velocity information generated by the touches. The dynamic or quasi-dynamic force detecting device according to claim 1, wherein the signal analyzing module is further configured to use a maximum value or a minimum value that occurs in a predetermined period of the fluctuation variation value as a characterization signal according to the characterization The signal obtains velocity information. The dynamic or quasi-dynamic force detecting device according to claim 1, wherein the dynamic or quasi-dynamic force detecting device further comprises a position detecting module, wherein the position detecting module is connected to the substrate for acquiring The position information on the substrate due to the touch. The dynamic or quasi-dynamic velocity detecting device according to claim 8, wherein the signal analysis module calculates the velocity information generated by the touch according to the fluctuation variation value and the position information. The dynamic or quasi-dynamic force detecting device according to claim 8, wherein the dynamic or quasi-dynamic force detecting device further comprises an anti-collision detecting module, wherein the anti-missing detecting module is configured to use the position information Compared with the predetermined position area, it is judged according to the comparison result whether the current elastic wave signal is an accidental collision. The dynamic or quasi-dynamic force detecting device according to claim 10, wherein the anti-collision detection module is further configured to use a duration and/or a signal strength of the elastic wave signal generated on the substrate to a predetermined threshold. For comparison, it is judged based on the comparison result whether the current elastic wave signal is an accidental collision. The dynamic or quasi-dynamic force detecting device according to claim 1, wherein the force detecting device further comprises an anti-collision detecting module, wherein the anti-collision detecting module is configured to elastic waves generated on the substrate The duration of the signal and/or the signal strength are compared with a predetermined threshold, and based on the comparison result, it is determined whether the current elastic wave signal is an accidental collision. The dynamic or quasi-dynamic force detecting device according to claim 1, wherein the force detecting device further comprises a correction module, wherein the correcting module is configured to obtain a pre-stored correction coefficient according to a frequency of the elastic wave signal; The correction coefficient adjusts the velocity information. The dynamic or quasi-dynamic force detecting device according to claim 1, wherein the force detecting device further comprises a noise canceling module, wherein the noise canceling module is configured to periodically perform an elastic wave signal generated on the substrate And analyzing, when the periodicity of the elastic wave signal meets a preset condition; obtaining an effective signal by removing the periodic signal component in the elastic wave signal, and obtaining the velocity information generated by the touch according to the effective signal. A dynamic or quasi-dynamic force detection sensing method, characterized in that the method comprises: Receiving an elastic wave signal generated by the touch on the substrate; Converting the elastic wave signal into a voltage signal; Obtaining a fluctuation change value of the voltage signal according to the voltage signal, and calculating, according to the fluctuation change value, velocity information generated by the touch. The dynamic or quasi-dynamic velocity sensing sensing method according to claim 15, wherein converting the elastic wave signal into a voltage signal corresponding to the frequency further comprises: filtering, amplifying, and rectifying the voltage signal. One or more processes in processing, switching processing, Fourier transform processing, and wavelet transform processing to obtain a preprocessed signal. The dynamic or quasi-dynamic velocity sensing sensing method according to claim 16, wherein the calculating the fluctuation variation value of the voltage signal according to the voltage signal comprises: according to the preprocessing signal and the voltage reference value The difference value is calculated to obtain the fluctuation change value. The dynamic or quasi-dynamic velocity sensing sensing method according to claim 15, wherein the calculating the velocity information generated by the touch according to the fluctuation variation value further comprises: a maximum value that occurs in a predetermined period by the fluctuation variation value. Or the minimum value is a characterization signal, and the velocity information is obtained according to the characterization signal. The dynamic or quasi-dynamic force detection sensing method according to claim 15, wherein calculating the velocity information generated by the touch according to the fluctuation variation value further comprises: acquiring position information generated by the touch on the substrate . The dynamic or quasi-dynamic velocity sensing sensing method according to claim 19, wherein calculating the velocity information generated by the touch according to the fluctuation variation value further comprises: calculating, according to the fluctuation variation value and the position information Get the velocity information generated by the touch. The dynamic or quasi-dynamic force detection sensing method according to claim 19, wherein the calculating the velocity information generated by the touch according to the fluctuation variation value further comprises: performing the location information and the predetermined location region Comparing, based on the comparison result, it is judged whether the current elastic wave signal is an accidental collision. The dynamic or quasi-dynamic velocity sensing sensing method according to claim 21, wherein the determining whether the current elastic wave signal is an accidental collision according to the comparison result further comprises: applying an elastic wave signal generated on the substrate The duration and/or signal strength is compared with a predetermined threshold, and it is determined whether the current elastic wave signal is an accidental collision based on the comparison result. The dynamic or quasi-dynamic velocity sensing sensing method according to claim 15, wherein the method further comprises: converting the elastic wave signal into a voltage signal of a corresponding frequency by one or more piezoelectric sensors; Calculating an energy value of the elastic wave according to the fluctuation value of the one or more voltage signals, and obtaining velocity information generated by the touch according to the energy value of the elastic wave. The dynamic or quasi-dynamic velocity sensing sensing method according to claim 23, wherein the calculating the energy value of the elastic wave according to the fluctuation variation value of the one or more voltage signals comprises: according to the voltage signal The fluctuation change value of the predetermined length is accumulated and/or averaged to obtain an energy value of the voltage signal; and the energy value of the elastic wave is obtained by accumulating and/or averaging according to the energy value of the one or more voltage signals. The dynamic or quasi-dynamic velocity sensing sensing method according to claim 23, wherein the method further comprises: dividing a plurality of velocity grading thresholds according to the energy value of the elastic wave; establishing the threshold according to the velocity grading threshold Corresponding output map mapping table; comparing the energy value of the elastic wave with the velocity grading threshold, and outputting a corresponding output instruction according to the comparison result and the mapping table. The dynamic or quasi-dynamic force detection sensing method according to claim 15, wherein the method further comprises: obtaining a pre-stored correction coefficient according to a frequency of the elastic wave signal; and adjusting the strength by the correction coefficient information. The dynamic or quasi-dynamic velocity sensing sensing method according to claim 15, wherein the method further comprises: periodically analyzing the elastic wave signal generated on the substrate, when the period of the elastic wave signal When the property meets the preset condition, the effective signal is obtained by removing the periodic signal component in the elastic wave signal, and the velocity information generated by the touch is obtained by calculation according to the effective signal. An electronic device comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor executes the computer program to calculate and obtain the voltage signal according to a voltage signal The fluctuation variation value is calculated according to the fluctuation variation value to obtain the velocity information generated by the touch. A computer readable storage medium, wherein the computer readable storage medium stores a fluctuation change value obtained by performing calculation of the voltage signal according to a voltage signal, and calculating velocity information generated by the touch according to the fluctuation change value. Computer program.

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